p° not stand the loud-speaker: tod. close to the set itself, or you may cause it to vibrate the filaments of the valves, and this will give rise to a loud hawl. Dust, fluff, and other similar foreign bodies, if allowed to enter the horn of a loud-speaker, may accumulate on the diaphragm and seriously interfere with reception.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19281207.2.72
Bibliographic details
Radio Record, Volume II, Issue 21, 7 December 1928, Page 29
Word Count
58Untitled Radio Record, Volume II, Issue 21, 7 December 1928, Page 29
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